FR2907713A1 - Producing decorative motifs on objects such as eyeglass frame and jewelry made of plastic material, comprises compressing a heated mold in contour of the object to be obtained from different color plates - Google Patents

Producing decorative motifs on objects such as eyeglass frame and jewelry made of plastic material, comprises compressing a heated mold in contour of the object to be obtained from different color plates Download PDF

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Publication number
FR2907713A1
FR2907713A1 FR0609353A FR0609353A FR2907713A1 FR 2907713 A1 FR2907713 A1 FR 2907713A1 FR 0609353 A FR0609353 A FR 0609353A FR 0609353 A FR0609353 A FR 0609353A FR 2907713 A1 FR2907713 A1 FR 2907713A1
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FR
France
Prior art keywords
contour
mold
color
decorative motifs
objects
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Pending
Application number
FR0609353A
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French (fr)
Inventor
Xavier Francois Denis M Derome
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Individual
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Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Individual filed Critical Individual
Priority to FR0609353A priority Critical patent/FR2907713A1/en
Publication of FR2907713A1 publication Critical patent/FR2907713A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0453—Ornamental plaques, e.g. decorative panels, decorative veneers produced by processes involving moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/20—Making multilayered or multicoloured articles
    • B29C43/203—Making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D12/00—Producing frames
    • B29D12/02—Spectacle frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B29C2043/023—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/002—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/001—Layered products the layers being loose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2012/00—Frames
    • B29L2012/005—Spectacle frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/722—Decorative or ornamental articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The process for producing decorative motifs on objects such as eyeglass frame and jewelry made of plastic material, comprises compressing a heated mold (1) in contour of the object to be obtained from different color plates, and removing the protuberant material over the contour to expose the color of a second plate (6). A bottom of the mold is placed on the plate (5). The material constitutes two cuttings in a hole (4) of the mold. A dimension of an imprint reproduces the object with decorative motifs. Three cuttings with identical contours have different thickness. The process for producing decorative motifs on objects such as eyeglass frame and jewelry made of plastic material, comprises compressing a heated mold (1) in contour of the object to be obtained from different color plates, and removing the protuberant material over the contour to expose the color of a second plate (6). A bottom of the mold is placed on the plate (5). The material constitutes two cuttings in a hole (4) of the mold. A dimension of an imprint reproduces the object with decorative motifs. Three cuttings with identical contours have different thickness and a median having a color contrasted with respect to each other. The obtained motif has reduced dimension.

Description

La présente invention est relative à un procédé pour réaliser des motifsThe present invention relates to a method for making patterns

décoratifs sur des objets en matière plastique et notamment en acétate de cellulose.  decorative objects on plastic and in particular cellulose acetate.

L'acétate de cellulose se travaille bien, se colle facilement, et peut être obtenue sous des couleurs variées, cette matière est donc recherchée pour la réalisation des montures de lunettes ou de bijoux fantaisie. Lorsque, dans un but décoratif, on souhaite associer deux couleurs, par 10 exemple, sur le même objet, il n'est guère possible de le faire qu'en empilant deux plaques de couleurs différentes. Si l'une des faces de l'objet doit présenter un motif défini, la seule solution consiste à appliquer à cet objet une technique bien connue en 15 ébénisterie : la marqueterie. Cette technique est très délicate et coûteuse et ne se prête pas à la fabrication en série. Le procédé de l'invention qui remédie à ces inconvénients consiste, dans une première phase, à comprimer dans un moule chauffé, au moins, deux 20 découpes, reproduisant le contour de l'objet à obtenir et réalisées à partir de plaques de couleurs différentes, le fond dudit moule, sur lequel est placée la découpe dont la couleur est dominante, comportant un évidement dans lequel flue la matière constituant les deux dites découpes, et dans une seconde phase et après démoulage, à enlever la matière formant une protubérance sur 25 l'ébauche au droit de l'emplacement dudit évidement pour faire apparaître la couleur de la seconde plaque. Le procédé de l'invention sera mieux compris par la description qui va suivre faite en se référant aux dessins annexés à titre d'exemple indicatif, 30 seulement, sur lesquels : 2907713 2 -la figure 1 est une vue en élévation d'une pièce à obtenir ; -la figure 2 est une vue en perspective éclatée montrant la mise en oeuvre de la première phase du procédé de l'invention ; - la figure 3 est la vue de dessus du moule de la figure 2 ; 5 -la figure 4 est une vue partielle et à plus grande échelle de la figure 3 ; - la figure 5 est une vue en coupe effectuée selon la ligne VV de la figure 4 ; - les figures 6 et 7 montrent la formation de la protubérance sur l'ébauche ; -la figure 8 est une vue de côté, partielle, de l'ébauche. - la figure 9 montre l'aspect de la pièce après retrait de la matière formant la 10 protubérance ; - la figure 10 est une vue analogue à celle 9, montrant un autre aspect de la pièce. En se reportant aux dessins, on voit que le problème à résoudre 15 consiste sur un objet A, tel qu'une branche de lunette réalisée en acétate de cellulose par exemple, de réaliser un motif B dont l'aspect, la couleur notamment, sera contrasté par rapport à celui de l'objet. Le procédé de l'invention a, aussi, pour but de réaliser de façon précise 20 la localisation du motif décoratif B. Selon l'invention, on utilise un moule 1, comportant une empreinte 2 reproduisant, en creux, le volume de la pièce à obtenir et dont le fond 3 présente un évidement 4 dont le contour reproduit, sensiblement, l'aspect de 25 celui à réaliser sur l'objet. Le procédé de l'invention consiste, dans une première phase, à comprimer dans le moule 1 trois découpes 5, 6 et 7, dont les contours sont ceux de l'objet A, une colle appropriée étant disposée sur les faces en 2907713 3 contact, la découpe 6 présentant une couleur différente de celle 5 qui repose sur le fond du moule. Dans l'exemple représenté, on utilise trois découpes mais, comme on le 5 comprendra par la suite, on peut se contenter des deux découpes 5 et 6. Selon un mode de réalisation, selon laquelle la compression est obtenue par un couvercle 8, l'épaisseur totale des trois découpes est supérieure à la profondeur de l'empreinte 2. Sous l'effet de la compression et de la chaleur, le moule étant chauffé, les trois découpes se déforment pour remplir l'évidement 4 et il a été constaté un résultant surprenant : les trois plaques se déforment sensiblement comme montré sur la figure 7. Lorsque l'ébauche de l'objet est démoulée elle se présente sous la forme montrée sur la figure 8 c'est-à-dire que la face 9 de l'objet, celle qui était en contact avec le fond du moule, présente une protubérance 10. 20 La seconde phase du procédé consiste à supprimer la protubérance 10, par ponçage ou meulage, de façon à ce que la face 9 soit plane. L'expérience a montré que selon l'épaisseur des découpes et la profondeur de l'évidement 4 on pouvait, selon le cas, obtenir un motif 25 présentant l'aspect de celui de la figure 9 ou de celui de la figure 10. Il a été constaté, aussi, qu'il était possible d'obtenir un motif se présentant sous la forme d'un croissant si le fond de l'évidement 4 n'était pas parallèle au fond 3 de l'empreinte 2. 15 30 2907713 4 Par un choix judicieux de la profondeur de l'évidement, de l'épaisseur des découpes et du nombre de celles-ci (quatre découpes par exemple), il est possible, par exemple, d'obtenir un motif analogue à celui de la figure 10, dont la couleur de la partie centrale serait différente de celle de l'objet. Dans l'exemple représenté, la découpe 6 est identique à celles 5 et 7, cette particularité se traduisant par l'obtention d'une bande contrastée sur les contours de l'ébauche. 10 En utilisant une découpe 6, dont les dimensions sont réduites par rapport à celles des autres découpes, il est possible de supprimer cette bande contrastée. Si, de plus, les découpes 5 et 7 sont de la même couleur, il est possible d'obtenir un objet de couleur uniforme dont seul le motif B ressort à l'emplacement désiré, emplacement qui découle du choix de la position de l'évidement 4. Selon une variante, on peut réaliser une découpe unique obtenue à partir d'une plaque multicouche du commerce.  Cellulose acetate works well, sticks easily, and can be obtained in various colors, this material is therefore sought for the realization of eyeglass frames or costume jewelry. When, for decorative purposes, it is desired to combine two colors, for example, on the same object, it is hardly possible to do so by stacking two plates of different colors. If one of the faces of the object must have a definite pattern, the only solution is to apply to this object a well known technique in cabinet making: marquetry. This technique is very delicate and expensive and does not lend itself to mass production. The method of the invention that overcomes these disadvantages consists, in a first phase, of compressing in a heated mold, at least two cuts, reproducing the contour of the object to be obtained and made from plates of different colors. the bottom of said mold, on which is placed the cutout whose color is dominant, having a recess in which flows the material constituting the two said cuts, and in a second phase and after demolding, to remove the material forming a protrusion on 25 the blank to the right of the location of said recess to reveal the color of the second plate. The method of the invention will be better understood from the following description with reference to the accompanying drawings by way of example only, in which: FIG. 1 is an elevational view of a part to obtain ; FIG 2 is an exploded perspective view showing the implementation of the first phase of the method of the invention; - Figure 3 is the top view of the mold of Figure 2; Figure 4 is a partial view on a larger scale of Figure 3; - Figure 5 is a sectional view taken along the line VV of Figure 4; - Figures 6 and 7 show the formation of the protuberance on the blank; FIG 8 is a partial side view of the blank. Figure 9 shows the appearance of the workpiece after removal of the material forming the protuberance; - Figure 10 is a view similar to that 9, showing another aspect of the room. Referring to the drawings, it can be seen that the problem to be solved consists of an object A, such as a bezel branch made of cellulose acetate, for example, to produce a pattern B whose appearance, in particular the color, will be contrasted with that of the object. The method of the invention also aims to achieve precisely the location of the decorative pattern B. According to the invention, using a mold 1, having a cavity 2 reproducing, hollow, the volume of the room to obtain and whose bottom 3 has a recess 4 whose contour reproduces substantially the appearance of the one to be made on the object. The method of the invention consists, in a first phase, in compressing in the mold 1 three cutouts 5, 6 and 7, the contours of which are those of the object A, a suitable adhesive being disposed on the faces in contact with each other. , the cutout 6 having a different color from that 5 which rests on the bottom of the mold. In the example shown, three blanks are used but, as will be understood hereafter, it is possible to be satisfied with the two blanks 5 and 6. According to one embodiment, the compression is obtained by a cover 8, The total thickness of the three cuts is greater than the depth of the impression 2. Under the effect of compression and heat, the mold being heated, the three blanks deform to fill the recess 4 and it was found a surprising result: the three plates deform substantially as shown in Figure 7. When the blank of the object is demolded it is in the form shown in Figure 8 that is to say that the face 9 of the object, which was in contact with the bottom of the mold, has a protuberance 10. The second phase of the process consists of removing the protuberance 10, by sanding or grinding, so that the face 9 is flat. Experience has shown that according to the thickness of the cuts and the depth of the recess 4, it is possible, as the case may be, to obtain a pattern 25 having the appearance of that of FIG. 9 or that of FIG. It has also been found that it was possible to obtain a pattern in the form of a crescent if the bottom of the recess 4 was not parallel to the bottom 3 of the impression 2. 2907713 4 By a judicious choice of the depth of the recess, the thickness of the cuts and the number of these (four cuts for example), it is possible, for example, to obtain a pattern similar to that of the figure 10, whose color of the central part would be different from that of the object. In the example shown, the cutout 6 is identical to those 5 and 7, this feature resulting in obtaining a contrasting band on the contours of the blank. By using a cutout 6, the dimensions of which are reduced compared to those of the other cuts, it is possible to suppress this contrasting band. If, in addition, the cutouts 5 and 7 are of the same color, it is possible to obtain an object of uniform color, of which only the pattern B comes out at the desired location, a location which results from the choice of the position of the recess 4. According to one variant, it is possible to produce a single cut obtained from a commercial multilayer plate.

Dans l'exemple représenté, l'évidement 4 est situé sur le fond du moule mais, sans sortir du cadre du procédé, ledit évidement 4 peut être prévu sur le couvercle 8 qui est convenablement découpé pour se comporter à l'instar d'un poinçon et pénétrer dans l'empreinte 2. 5  In the example shown, the recess 4 is located on the bottom of the mold but, without departing from the scope of the method, said recess 4 can be provided on the cover 8 which is properly cut to behave like a punch and penetrate the footprint 2. 5

Claims (5)

REVENDICATIONS 1-Procédé pour réaliser des motifs décoratifs sur des objets en matière plastique consistant, dans une première phase, à comprimer dans un moule chauffé (1), au moins, deux découpes reproduisant le contour de l'objet à réaliser obtenues à partir de plaques de couleurs différentes, le fond (3) dudit moule, sur lequel est placée la plaque (5) dont la couleur est dominante, comportant un évidement (4) dans lequel flue la matière constituant les deux dites découpes, et dans une seconde phase et après démoulage, à enlever la matière formant une protubérance (10) sur l'ébauche, au droit de l'emplacement dudit évidement, pour faire apparaître la couleur de la seconde plaque (6).  1-Process for producing decorative patterns on plastic objects consisting, in a first phase, of compressing in a heated mold (1), at least two cutouts reproducing the contour of the object to be obtained obtained from plates of different colors, the bottom (3) of said mold, on which is placed the plate (5) whose color is dominant, having a recess (4) in which flows the material constituting the two said cutouts, and in a second phase and after demolding, removing the material forming a protuberance (10) on the blank, in line with the location of said recess, to reveal the color of the second plate (6). 2-Procédé selon la revendication 1, selon lequel les dimensions de 15 l'empreinte (2) reproduisent celle de l'objet à obtenir et, au moins, celles de la face de l'objet sur laquelle on souhaite réaliser un motif décoratif.  2-Process according to claim 1, wherein the dimensions of the footprint (2) reproduce that of the object to be obtained and, at least those of the face of the object on which it is desired to achieve a decorative pattern. 3-Procédé selon l'une des revendications 1 et 2, consistant à réaliser trois découpes (5, 6 et 7), à contour identique mais pouvant présenter des 20 épaisseurs différentes, celle médiane (6) ayant une couleur contrastée par rapport aux deux autres.  3-Method according to one of claims 1 and 2, consisting of making three cuts (5, 6 and 7), identical contour but may have different thicknesses, the median (6) having a contrasted color compared to the two other. 4-Procédé selon l'une des revendications 2 et 3, caractérisé en ce que la découpe (6) présentant une couleur contrastée, celle du motif à obtenir, 25 présente des dimensions plus réduites par rapport à celles de la ou des autres découpes.  4-Method according to one of claims 2 and 3, characterized in that the cutout (6) having a contrasting color, that of the pattern to obtain, 25 has smaller dimensions compared to those of the other or cuts. 55
FR0609353A 2006-10-25 2006-10-25 Producing decorative motifs on objects such as eyeglass frame and jewelry made of plastic material, comprises compressing a heated mold in contour of the object to be obtained from different color plates Pending FR2907713A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0609353A FR2907713A1 (en) 2006-10-25 2006-10-25 Producing decorative motifs on objects such as eyeglass frame and jewelry made of plastic material, comprises compressing a heated mold in contour of the object to be obtained from different color plates

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Application Number Priority Date Filing Date Title
FR0609353A FR2907713A1 (en) 2006-10-25 2006-10-25 Producing decorative motifs on objects such as eyeglass frame and jewelry made of plastic material, comprises compressing a heated mold in contour of the object to be obtained from different color plates

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20131582A1 (en) * 2013-09-25 2015-03-26 Mazzucchelli 1949 S P A PROCESS OF MANUFACTURE OF A PRODUCT BASED ON CELLULOSE ACETATE WITH SHADED COLORING AND PRODUCT OBTAINED BY THIS PROCESS.
CN105835596A (en) * 2016-05-25 2016-08-10 杨传祥 North red agate pendent
CN105835599A (en) * 2016-05-23 2016-08-10 杨传祥 Northern-red agate hanging picture

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1446422A (en) * 1965-05-31 1966-07-22 Economical marking or decoration process
FR2107805A1 (en) * 1970-09-18 1972-05-12 Levy Gilbert Relief label blanks - made from sheet protected with a tear sensitive paper/film composite

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1446422A (en) * 1965-05-31 1966-07-22 Economical marking or decoration process
FR2107805A1 (en) * 1970-09-18 1972-05-12 Levy Gilbert Relief label blanks - made from sheet protected with a tear sensitive paper/film composite

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20131582A1 (en) * 2013-09-25 2015-03-26 Mazzucchelli 1949 S P A PROCESS OF MANUFACTURE OF A PRODUCT BASED ON CELLULOSE ACETATE WITH SHADED COLORING AND PRODUCT OBTAINED BY THIS PROCESS.
EP2871035A1 (en) * 2013-09-25 2015-05-13 Mazzucchelli 1849 S.p.A. Manufacturing process of a product based on cellulose acetate with blended colour, and product, such as spectacles, obtained by such process
US9776345B2 (en) 2013-09-25 2017-10-03 Mazzucchelli 1849 S.P.A. Manufacturing process of a product based on cellulose acetate with blended colour
CN105835599A (en) * 2016-05-23 2016-08-10 杨传祥 Northern-red agate hanging picture
CN105835596A (en) * 2016-05-25 2016-08-10 杨传祥 North red agate pendent

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